Originally Posted by sullivanspop
I guess anything is possible but traditionally, harnesses aren't used for training are they?
I guess that depends on what you mean by "traditionally". Some people would define "traditional" as the old-style jerk and pull methods, along with things like choke chains and spike collars. Fortunately, we now live in a more enlightened age and those sorts of "training" methods are largely obsolete.
The aim of training a dog is to have it respond to your commands, and to teach it the sort of behaviour you want from it (which includes how to walk nicely). That is best achieved by positive training methods and there is absolutely no reason why you shouldn't do that with a harness instead of a collar. It is not the type of collar or harness you're using that's doing the training
or at least, it shouldn't be. If a harness is what works for you and your dog, then by all means use it.